m_font may not have been set yet. Default to letting GetTextExtent

[wxWidgets.git] / src / x11 / region.cpp

diff --git a/src/x11/region.cpp b/src/x11/region.cpp
index 1f7f4d5929a542e77593410cf59e19fee0f42b15..78be8597084ab2b73f918d2c64f0cf95438d0fba 100644 (file)
--- a/src/x11/region.cpp
+++ b/src/x11/region.cpp
@@ -1,14 +1,14 @@
 /////////////////////////////////////////////////////////////////////////////
 // File:      region.cpp
 // Purpose:   Region class
-// Author:    Markus Holzem, Julian Smart, Robert Roebling
+// Author:    Julian Smart, Robert Roebling
 // Created:   Fri Oct 24 10:46:34 MET 1997
-// RCS-ID:      $Id$
-// Copyright: (c) 1997 Markus Holzem, Julian Smart, Robert Roebling
+// RCS-ID:    $Id$
+// Copyright: (c) 1997 Julian Smart, Robert Roebling
 // Licence:   wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
-#ifdef __GNUG__
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
 #pragma implementation "region.h"
 #endif
 
@@ -149,6 +149,12 @@ void wxRegion::Clear()
 
 bool wxRegion::Union( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
 {
+    // work around for XUnionRectWithRegion() bug: taking a union with an empty
+    // rect results in an empty region (at least XFree 3.3.6 and 4.0 have this
+    // problem)
+    if ( !width || !height )
+        return TRUE;
+
     XRectangle rect;
     rect.x = x;
     rect.y = y;